31. The room is in a terrible mess; it _______ cleaned.A．can’t have beenB．should

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31. The room is in a terrible mess; it _______ cleaned.

A．can’t have been	B．shouldn’t have been
C．mustn’t have been	D．wouldn’t have been

答案

解析

略

举一反三

Naturally, after I tell my brother what to do, he ____ go and do the opposite．

A．will

B．may

C．can

D．must

题型：不详难度：| 查看答案

16.You can"t imagine that a well-behaved gentleman__________be so rude to a lady.

A．might

B．need

C．should

D．Would

题型：不详难度：| 查看答案

22．Despite the fact that Betty is a lovely girl, she____be extremely difficult to work with sometimes.

A．must

B．should

C．would

D．Can

题型：不详难度：| 查看答案

12. To my surprise, some of my students_____ stay up to study for the coming examination

A．may

B．must

C．can

D．Should

题型：不详难度：| 查看答案

“Dear, if you listen to me, you ______ have some candies as a reward,” the woman told her little son.

A．shall

B．do

C．should

D．must

题型：不详难度：| 查看答案